<h2>What's changed</h2> <ul> <li>Added Code Mode, an experimental opt-in in which Claude writes JavaScript to call its tools; see <a href="https://code.claude.com/docs/en/code-mode" rel="nofollow">https://code.claude.com/docs/en/code-mode</a> to turn it on, or to turn it off for an organization</li> <li>Added <code>engines["claude-code"]</code> to <code>plugin.json</code>: plugins outside their stated Claude Code version range are not installed, updated or loaded, and install and update pick the newest version that fits</li> <li>Added type checking of a plugin's TypeScript hooks module to <cod